Can other altcoins handle miners hash rates once ETH is out of the picture in June? This is what's still keeping me away from building some new mining rigs presently, what do you think will happen?
Why fear? The good thing with GPU mining is - you can mine many other currency - sure the profitability of every other coin will drop if ETH go to PoS (maybe in 2023 but not this year, Vitalik will test his PoS on Doge first
) - but it will raise again after a certain time - same things happen after Litecoin mining was over for GPU´s or BTC mining.